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Fluid Viscosity/Density Guide

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    Simple & Useful Conversions 

    Viscosity is commonly understood to be a fluids thickness or resistance to flow. There are many units of measurement when referring to viscosity, below are some simple and useful conversions to understand the thickness of various fluids:

    cSt (Centistokes) or mm²/s x 4.62 = SSU (Seybolt Seconds Universal)

    cPs (Centipoise) or mPa = cSt / S.G (Density)

    º Engler / 0.132 = cSt

    Below is a table of common fluid densities and viscosities across different temperature ranges based on reliable and trusted information collated from numerous sources within the industry and our own internal knowledge and experience. If you have a fluid which isn’t contained within this list please send us your Material Safety Data Sheet or Chemical Safety Data Sheets with your enquiry so we can be sure to offer you a suitable pump for your requirements. If there are no accessible MSDS or COSHH Sheets available then you can also find in our Tech Zone some videos of various fluids at different viscosities to provide a rough comparison.

    Furthermore, we also have the ability to calculate operating viscosities based on actual operational temperatures. If you can provide viscosity information on your fluid at 2 set points (40 & 100ºC for example) and your operating temperature then we can extrapolate the operating viscosity from this information.

    Fluid Temp ºC Viscosity cSt Density kg / Litre Fluid Temp ºC Viscosity cSt Density kg / Litre
    Acetaldehyde 20 0.295 0.788 Machine Oil – Light 20 47 0.9
    Acetic Acid 20 1.232 1.048 Machine Oil – Medium 20 850 0.94
    Acetic Acid Anhydride 20 0.88 1.084 Mayonnaise 20 2 N/A
    Acetone 20 0.41 0.79 Mercury 20 0.119 13.57
    Allyl Alcohol 20 1.603 0.852 Methyl Acetate 20 0.44 0.959
    Allyl Alcohol 30 1.36 0.848 Methyl Acetate 40 0.35 0.916
    Allyl Chloride 20 0.354 0.94 Methyl Alcohol 0 1.04 0.81
    Aluminium Chloride (5% Sol) 20 3.54 1.03 Methyl Alcohol 10 0.855 0.801
    Aluminium Nitrate (10% Sol) 20 4.54 1.051 Methyl Alcohol 20 0.745 0.792
    Aluminium Sulphate (10% Sol) 20 1.34 1.115 Methyl Glycol 20 1.6 0.975
    Amyl Acetate 20 4.34 0.885 Methylene Chloride 20 0.9 1.326
    Aniline 10 6.4 1.03 Milk 20 1.13 1.035
    Aniline 20 4.37 1.021 Molasses 80 Bx 20 10 N/A
    Beer 20 1.8 0.996 Molasses 83 Bx 20 50 N/A
    Benzene 20 0.744 0.879 Molasses 85 Bx 20 100 N/A
    Benzene 30 0.65 0.868 Nitro Benzene 20 1.67 1.203
    Benzene 40 0.58 0.858 Nonane 0 1.35 0.733
    Benzene 50 0.54 0.847 Nonane 10 1.15 0.725
    Benzyl Alcohol 20 5.52 1.045 Nonane 20 1 0.717
    Bromine 20 0.34 3.12 Octane 0 1.05 0.719
    Butyl Acetate 20 0.832 0.885 Octane 10 0.935 0.711
    Butyl Alcohol 20 3.64 0.81 Octane 20 0.805 0.702
    Butyl Alcohol 30 2.85 0.803 Octane 40 0.64 0.685
    Butyric Acid n 0 2.35 0.977 Oil, SAE 10W-30 20 130 0.875
    Butyric Acid n 20 1.61 0.957 Oil, SAE 10W 20 115 0.87
    Calcium Chloride (25% Sol) 20 3.9 1.227 Oil, SAE 20W-20 20 200 0.885
    Calcium Chloride (5% Sol) 20 1.161 1.037 Oil, SAE 30 20 350 0.89
    Carbolic Acid 20 11.3 1.078 Oil, SAE 40 20 900 0.9
    Carbolic Acid 30 9.7 1.069 Oil, SAE 50 20 950 0.902
    Carbolic Acid 40 7.95 1.059 Olive Oil 20 91.5 0.91
    Carbon Disulphate 0 0.33 1.292 Palm Oil 20 130 N/A
    Carbon Disulphate 10 0.316 1.277 Paraffin Oil 20 2.4 0.804
    Carbon Disulphate 20 0.298 1.262 Paraffin Oil 30 1.85 0.78
    Carbon Tetrachloride 20 0.612 1.595 Pentane 0 0.44 0.646
    Carbon Tetrachloride 30 0.525 1.525 Pentane 10 0.39 0.636
    Castor Oil 20 1017 0.96 Pentane 20 0.36 0.626
    Castor Oil 40 315 0.95 Phenol 20 11.3 1.078
    Castor Oil 60 115 0.94 Phenol 40 7.95 1.059
    Caustic Soda, 50% 20 45 N/A Polyester Resin 20 3 N/A
    China Wood Oil 20 308 0.933 Polymer Solution 20 20 N/A
    Chloroform 20 0.38 1.489 Potassium Hydroxide 20 67 N/A
    Chloroform 40 0.37 1.452 Printing Ink & Colours 20 550-2200 N/A
    Chloroform 60 0.35 1.415 Propanol 20 2.8 0.804
    Cod Liver Oil 40 35 N/A Propanol 40 1.7 0.786
    Cotton Seed Oil 20 76 0.926 Propanol 50 1.4 0.777
    Cream, 30-50% Fat 20 11-115 N/A Propionic Acid 20 1.13 0.99
    Cyclohexanol 20 71 0.952 Propylene Glycol 20 54 1.038
    Cyclohexanone 20 4.9 0.952 Rapeseed Oil 20 178 0.92
    Cylinder Oil 20 50000 0.94 Sea Water 0 1.774 1.028
    Dioxan 20 2 1.03 Sea Water 10 1.346 1.028
    Ethyl Acetate 20 0.51 0.905 Sea Water 20 1.044 1.025
    Ethyl Alcohol 20 1.51 0.772 Sea Water 40 0.659 1.019
    Ethyl Alcohol 40 1.16 0.737 Sea Water 60 0.442 1.01
    Ethyl Glycol 20 2.3 0.93 Sea Water 80 0.311 0.998
    Ethylene Glycol 20 18 1.112 Shampoo 20 3 N/A
    Ethylene Glycol 30 16.5 1.104 Sodium Chloride (25% Sol) 20 2.4 1.19
    Formic Acid 20 1.5 1.22 Sodium Hydroxide (20% Sol) 20 4 1.226
    Formic Acid 30 1.38 1.208 Sodium Hydroxide (30% Sol) 20 10 1.33
    Fuel Oil, Extra Light 20 6 0.85 Soya Bean Oil 20 75 0.926
    Fuel Oil, Light 20 16.5 0.91 Styrene 20 0.9 0.926
    Fuel Oil, Medium 20 520 0.99 Sulphuric Acid 20 14.6 1.839
    Fuel Oil, Heavy 20 8000 0.99 Tetrachloroethane 20 1.1 1.593
    Furfural 20 1.45 1.16 Tetrachloroethane 20 0.95 1.621
    Gear Oil 20 3000 0.905 Toluene 20 0.68 0.867
    Gelatine 45 1.2 N/A Toluene 40 0.55 0.849
    Glycerine 20 1183 1.261 Toluene 60 0.46 0.831
    Glycol 20 20 N/A Tomato Ketchup 30 1 N/A
    Heptane 0 0.74 0.702 Transformer Oil 20 30 0.95
    Heptane 10 0.66 0.692 Trichloroethylene 20 0.95 1.463
    Heptane 20 0.6 0.682 Water 0 1.788 1
    Heptane 40 0.51 0.661 Water 10 1.307 1
    Hexane 0 0.62 0.678 Water 20 1.002 0.998
    Hexane 10 0.57 0.668 Water 40 0.662 0.992
    Hexane 20 0.51 0.658 Water 60 0.475 0.983
    Hexane 40 0.4 0.639 Water 80 0.365 0.972
    Honey 40 2 N/A Water 100 0.295 0.958
    Kerosene 20 2.4 0.804 Xylene-O 20 0.93 0.864
    Kerosene 30 1.85 0.78 Xylene-O 40 0.74 0.847
    Linseed Oil 20 47 0.92 Yoghurt 40 150 N/A

     

     

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